protected void ButtonLogout_Click(object sender, EventArgs e)
{
string authToken = Session["authToken"] as string;
// Here is the main call to Field API.
bool result = Glue.Logout(authToken);
Session["authToken"] = "";
ButtonLogin.Enabled = true;
ButtonLogout.Enabled = false;
// For our learning,
// show the request and response in the form.
ShowRequestResponse();
}